Black hole collapse and democratic models

TL;DR

This paper investigates black hole entropy and temperature evolution during collapse, revealing features consistent with democratic models of black hole microstates and proposing these models as a microscopic explanation.

Contribution

It demonstrates that entropy and temperature oscillations in black hole collapse match features of democratic models, suggesting these models as microscopic theories of black holes.

Findings

Entropy evolution is extensive.

Entropy and temperature oscillate with twice the frequency of quasinormal modes.

Entropy oscillations align with black hole area theorems.

Abstract

We study the evolution of black hole entropy and temperature in collapse scenarios, finding three generic lessons. First, entropy evolution is extensive. Second, at large times, entropy and temperature ring with twice the frequency of the lowest quasinormal mode. Third, the entropy oscillations saturate black hole area theorems in general relativity. The first two features are characteristic of entanglement dynamics in `democratic' models. Solely based on general relativity and Bekenstein-Hawking entropy formula, our results point to democratic models as microscopic theories of black holes. The third feature can be taken as a prediction for democratic models coming from black hole physics.